インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス
Elemental Module Intrinsic Function (Generic): Returns whether an IEEE value is negative.
USE, INTRINSIC :: IEEE_ARITHMETIC
result = IEEE_IS_NEGATIVE (x)
x |
(Input) Must be of type REAL. |
The result type is default logical. The result has the value true if the value of x is negative; otherwise, false.
An IEEE value is negative if IEEE_CLASS(x) has one of the following values::
IEEE_NEGATIVE_NORMAL |
IEEE_NEGATIVE_ZERO |
IEEE_NEGATIVE_DENORMAL |
IEEE_NEGATIVE_INF |
IEEE_IS_NEGATIVE (2.0) has the value false.